Apparatus for feeding fuel oil to burners for boilers and similar installations



Jan. 21, 1936. J. c. JOHNSON 2,028,393

APPARATUS FOR FEEDING FUEL OIL TO BURNERS 7 FOR BOILERS AND SIMILAR INSTALLATIONS I Filed Dec. 15, 1954 2 Sheets-Sheet l ATTORNEY 3 9 w h 2 Q 0 2 e m 8 M5 NN R O J 21, 93 J. c. JOHNSON .APYARATUS FOR FEEDING FUEL OIL TO EU I FOR BOILERS AND SIMILAR INSTALLATI Filed Dec.

INVENTO Patented Jan. 21, 1936 PATENT OFFICE APPARATUS FOR- FEEDING FUEL OIL TO BURNERS FOR BQILERSL'AND SIMILAR INSTALLATIONS Jesse C. Johnson, Oakland, Calif.

Application December 15, 1934,. Serial No. #5711 12 5 Claims. (01. 137-78) This invention is an apparatus for feeding fuel oil to burners for boilers and similar installations.

One of the objects of the invention is to provide a feeding apparatus for fuel oil, so designed, constructed and arranged as to insure a regular, continuous and uniform flow of fuel oil to 'the burner atomizer. A further objectis to adequately regulate the feed of oil at the starting of the burner operation. A further object is to provide a multiple-stand-pipe oil reservoir connected with the feed line to the'burner, in such manner as to provide a gravity feed to the burner, said feed being controlled by the use of a motor-operated pumping system. Another object is to pro vide means for freeing any air whichmayhav been trapped in the oil, before it is delivered to the burner. r v

The invention willbe hereinafter fully set forth and particularly pointed out in the claims.

20 In the accompanying drawings:---

illustratinga fuel feeding apparatus constructed in accordance with the invention. Figure 2 is'a. side elevation with the multiple-stand-pipe shown elevation of the'multiple-stand-pipe and siphon breaker. Figure 4 is an enlarged detail sectional view of a portion of the multiple-stand-pipe memsiphon breaker.

Referring to the drawings, designates the boiler to be heated by the burner,

thesame being mounted upon legs I I, only one of vided with a hollow motor shaft, and through which the oil passes to feed the atomizer in the fire box in a manner well understood in the art. The pump I3 is connected with a tank l5 by means of a supply pipe 16 which is connected with .a strainer I1, the strainer in turn being connected with a lower chamber in the pump casing, by means of a conduit-J8. The parts thus far described, are all of standard construction in common use and are not herein claimed, except insofar as they are necessary to the operation of the invention here involved. Leading from the chamber in the bottom of the pump casing is a conduit Figure 1 is a top plan view, partly in section,

in'longitudinal section. 'Figure 3 is a: vertical.

ber. Figure 5 is a vertial sectional view of the l0 conventionally l9 which discharges int the multiple-stand-pipe member M.

'The multiple-stand-pipe member consists of a supporting casting 20 provided with a receiving chamber 2| formed by a transverse partition 22 which is provided with a central threadedopening. Above the chamber 2| the casting 20 is provided with a delivery chamber 23 and an overflow chamber 24. Extending upwardly from the partition 22 through the chambers 23 and 24, and

communicating with the chamber 2|, is a pipe or conduit 25. Extending upwardlyfrom the partition wall 26 which divides members 23 and 24, is

a larger conduit 21, the lower end'of which communicateswith the chamber 23, said conduit 21 being concentric with and enclosing the conduit 25. 'It will be noted that the conduit 21 extends above the end of the conduit a substantial distance as indicated at 28. 7 Leading from the top of the casting 20 is a larger conduit29 concentric with the conduits 25 and 21 and enclosing the same, said conduit 29 communicating with the overflow chamber 24. It

will be noted that the conduit 21 is provided with a. bleed opening controlled by a valve 30. The

supply chamber 23 is connected with a. magnetic valve 3| of the usual type, by means of an outlet conduit 32, and said magnetic valve is connected with the hollow shaft of the burner by means of a conduit 33. The overflow chamber 24 is connected by means of an overflow pipe 34 with the tank 15. It will be noted that theconduit 29 'extends a substantial distance above the upper end of the conduit 21, as indicated at 35 and is closed by a cap 36.

The siphon breaker consists of a casing 40 having an inlet opening 4| communicating with the interior of the cap 36. The top: 42 of the casing 40 is removable and is provided with an air discharge conduit 43. Within said conduit is located a valve seat 44 which is complemental to a needle valve 45 provided with wings 46 which rest upon a float 41, the float is guided in its movement by a fixed stem 48.

In operation, when the current is turned on tothe burner motor in the usual manner, the pump motor'is energized and the magnetic valve is energized. As a result, oil will be drawn from the tank l5 through the pipe "5 and strainer 11 and then through the chamber beneath the pump casing, being then delivered to the receiving chamber 21. From the receiving chamber the oil travels upwardly through conduit 25' and overflows atthe upper end thereof within the. space 28 of the conduit 21. The oil will then flow downwardly into the delivery chamber 23 and from thence to the hollow shaft of the pump and then into the burner atomizer in a well known way. It will be noted that while the oil is being 5 pumped through the conduit 25, a larger amount of oil will overflow from said conduit than is necessary to support the burner flame. The surplus oil flows over the top of the conduit 21 and drops into the overflow chamber 24- and will then. be returned to the tank through conduit 34. The

object of the bleed hole controlled by the valve is to cause an early overflow of the oil as it passes down between the conduits-.25 eanda2l:,.soz:- that only a small quantity oipoiliatllowapressuregs.. 15 for a short period of time, will reach the burner after the burner motor is first started. t The. size. of the bleeder will be controlled by the valve 30.

Only a stoppage of conduitx34 COllIdFCBzllSQ'iOih' to flow into extension and into chamber...40..,

As the oil flows up into the extension 35;it will also eventuallyr. overflow into the. chamber: 40 so that the float 41 is lifted so as to seat the. valve 45 to prevent, escape of; the oil and t0= .conline it: in such manner. that the overflow: will .be 1 25;.returned to .the tank; As soon-.as.the..pressur.e.a

of the overflowis reduced, the float. :41; will drop and open the vent 43v so thatyair. ispermittedto; enter the upper part ..of the. stand-pipe; and; counteract any tendency of the downflowing.;oil;.-

in the conduit 29 to-createsiphon and robithe burner of fuel.

The advantagesof-theinvention will be readily understood by those skilled in the=art to. which. it belongs. For instance, it will be. particularly notedthat the device is so constructedandar-w ranged as to provide a continuous anduniform-:-

flow of fuel to the burner atomizer-at a gravity pressure and in such manner thatthe starting of:

the burner operation is greatly facilitated. An important advantage of the multiple-stand-pipe construction is that auniform gravity feediof the oilisprovided and at the sametime any tendency to produce a siphonic action toa suflicientextent to rob the burner is completely prevented m Having thus explained-the nature-of'the-in vention and described an operative manner of con--' structing and using the same, although'without attempting to set forth ,all'of the forms in which it may be made, or all of the forms. of. its-use," what is claimed .is:

1. In an apparatusfor-feeding fuel oil,"a multiple column stand-pipe comprisinga base providedwith an inlet chamber having an inlet. open-.- ing, an outlet chamber having an outlet opening..-,

' and an overflow chamber having an outletopening, a supply conduit leading from said ,inlet', chamber,. a discharge .conduitrconcentric. .withll the first conduit and connectedwith theoutlet 6o chamber, an overflow .conduit concentric .with,.

the other conduits and-connected with the. ovcrflow chamber, said discharge conduit extending higher than the supply conduitbutnot solhigh: as the overflow conduit, and means for venting said discharge conduit into said overflow conduit intermediate the ends of said discharge; conduit.

2 In an apparatus for feedingiuel-oil, a 1111111 tiple column stand-pipe comprising a-:base.lpro-.-

vided with an inlet-chamber;havingcaninlet-i 1 opening, an outlet chamber-having anoutletopene ingand an overflow.chamber-.having an outlet. opening, a supply conduit leading fromsaidainlet chamber, a discharge conduit concentric with':the.-. first conduit and connectedawith thezoutlet-chamex her, and an overflow conduit concentric with the other conduits and connected with the overflow chamber, said discharge conduit extending higher than the supply conduit but not so high as the overflow conduit, said conduits having upper free ends with the upper free end of the supply conduit terminating within the discharge conduit, said discharge conduit having a bleed opening therein.

3. In an apparatus for feeding fuel-oil, a multiple column stand-pipe comprising a casting provided with an upper open end and two relatively spaced:rpartitionsnproviding an inlet chamber hayingan inlet-opening, an outlet chamber having anroutleta-opening, and an overflow chamber having.,an. outlet opening, a supply conduit-leading upwardly from the inlet chamber, a dischargeconduitconcentric with the first conduit and leading upwardly from the outlet chamber,

anoverflow conduit connected with the open end ofzsaid i casting and i leadin {upwardly therefrom, said-discharge conduit being. :;located within the overflow conduit, and connected with .the supply chamber through-lone '201'. said partitions, the supplyconduit. being located within .the dischargeiconduit andtconnected-= with the supply conduit throughthe others ofsaid partitions, said conduits being Lin -.communication-.wi-th each-other at their-*upDQn-ends; and said discharge conduit and overflow conduit.@being; .in .communication with, each 1.0131161? intermediate. their: ends.

4.- Inan-apparatus for-.feedingwfuel oil; a multiple column? stand-pipe comprisinga base provided 1with an -inlet1 chamber shaving an 1 inlet openings,anlxroutletrchamber. having ;an outlet opening-.5; and :an: overflow chamberv. having an outlet opening, a supply conduit leading ,from said inlet. chamber, a :discharge conduit: concentric with; .-the-. firstgconduit. and connected: .withthe outlet chambers; and-;an --overflow. conduit concentriciwiththe otherrconduits and connected with the: loverflow, chamber; said=.discharge, con-.-

duit; extending higher-than rthe supply 3 conduit but; not so high ascthezroverflow conduit; said discharge; 5 conduit; ihaving a bleedtopening therein,

anda cap. .closingthevuppenend ofsaid overflow conduit:

In .anzapparatusior feeding fuelgoil, a multiple ucolumnrstandapipeccomprising a base pro-.- vided with an inlet chamber havingan inlet opening,:;,an-:.outlet chamber haying ranr, outlet opening and an overflow-chamber.havingan outlet. opening, va ;supply;conduitrleading :from said inlet -.chamber,-r,a cdischa'rge conduit; (concentric with the-:first conduit: :and {connected fiwith, the outlet.- chamber; an: .overflowzconduit concentric with the other conduitsxandmonnected with-the overflow chamber, saidcdischarge. conduit: extending..higher, thanithe-supply conduit but not so. high... the...overflowconduit,- said i conduits being incommunication. with .each. other at. one end thereof,'said discharge .condu'itv being provided with? an.- opening of ,variable .areav intermediate itsiends for. permitting flow of fluid con-,

tained in said conduitinto' said overflow conduit, i

achamber'connecte'd -'with"-theupper end of the overflowconduit-fa chambercommunicating with said overflow conduit and-having a I ventopening therein, and -a float' valve controlling said ventopening and so constructed and-arranged to prevent-siphonic action of the oil in the overflow-pipe when: feedingipressurezupcn =the-oil .is reduced.

JESSE CiIJOI-INSON 

